Dashboard does not show values that should be

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Estimates in the administration panel start, the Dashboard table, which shows the total purchase within a range of days, orders, etc ... The theme appears I have with this is that if I put only those of a day itself, I get five orders is correct, but the sum of those tells me is "130060" and when I do the sums itself gives me "124,000" and do not know where he gets those 6,060 are others. I modified the code to add including iva and not even so agree me, someone will know what happens?

 

my prestashop version is 1.6.0.8